Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
6.0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
6
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
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Solution
S=∞∑n=02n+33n ⇒S=330+531+732+933+...⋯(1)
This is an A.G.P. ⇒13S=33+59+733+....⋯(2)
So subtracting (1) and (2) we get, ⇒23S=3+(23+29+227+......) ⇒23S=3+2⎛⎜
⎜
⎜⎝131−13⎞⎟
⎟
⎟⎠ ⇒23S=3+2×12⇒S=6