You visited us 1 times! Enjoying our articles? Unlock Full Access!

nth Term of an AP

If 7th and 13...

Question

If $7^{t h}$ and $13^{t h}$ terms of an AP be 34 and 64, then its $18^{t h}$ and $25^{t h}$ term is :

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

Open in App

Solution

The correct options are
C 89
D 90
$a_{n} = a + (n - 1) d a + 6 d = 34 - - - (1) a + 12 d = 64 - - - (2) S o l v i n g (1) a n d (2), a = 4 a n d d = 5 a_{18} = 4 + (17) 5 = 89$
Similarly $25^{t h}$ term is,
a_{25} = 4+(24)5=124\)

Suggest Corrections

Similar questions

If the $7^{t h}$ and $13^{t h}$ terms of an AP are 34 and 64 respectively, then its $18^{t h}$ term would be ____

7^{th}

13^{th}

18^{th}

If the $7^{t h}$ and $13^{t h}$ terms of an AP are 34 and 64 respectively, then the $18^{t h}$ term of the AP would be ___.

7 t h

13 t h

A . P

34

64

18 t h

7^{t h}

13^{t h}

18^{t h}

Join BYJU'S Learning Program