If number of terms in the expansion of x-2 y-3 zn are 45- then n-A- 7B- 8C- 9D- None of these

The correct option is B 8 (n+1)(n+2)/2 = 45 or n^2 + 3n 88 = 0 ⇒ n = 8 ... ...

You visited us 38 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XI

Mathematics

Sum of binomial coefficients of odd numbered terms

If number of ...

Question

If number of terms in the expansion of

$(x - 2 y + 3 z)^{n}$ are 45, then n =

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

None of these

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
8

$\frac{(n + 1) (n + 2)}{2}$ = 45 or $n^{2}$ + 3n - 88 = 0 ⇒ n = 8 ...

Suggest Corrections

Similar questions

If number of terms in the expansion of $(x - 2 y + 3 z)^{n}$ are 45, then n =

Q. If number of terms in the expansion of

(x + 2 y + 3 z)^{n}

are

45

, then

n

is equal to -

Q. If the coefficients of the (n + 1)^th term and the (n + 3)^th term in the expansion of (1 + x)²⁰ are equal, then the value of n is
(a) 10
(b) 8
(c) 9
(d) none of these

If $x^{4}$ occurs in the $r^{t h}$ term in the expansion of $(x^{4} + \frac{1}{x^{3}})^{15}$ , then r =

In ( $\sqrt[3]{2} + \frac{1}{\sqrt[3]{3}})^{n}$ if the ratio of $7^{t h}$ term from the beginning to the $7^{t h}$ term from the end is $\frac{1}{6}$ , then n =

Join BYJU'S Learning Program

If number of terms in the expansion of (x−2y+3z)n are 45, then n =

The correct option is B 8 (n+1)(n+2)2 = 45 or n2 + 3n - 88 = 0 ⇒ n = 8 ...

If number of terms in the expansion of

$(x - 2 y + 3 z)^{n}$ are 45, then n =

The correct option is B
8

$\frac{(n + 1) (n + 2)}{2}$ = 45 or $n^{2}$ + 3n - 88 = 0 ⇒ n = 8 ...