Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In the expansion of 
, the number of integral terms is
Text Solution
Verified by ExpertsThe correct answer is:
B
Here 
, a power of 2, where as the power of 7 is 
Now first term 
(integer)
And after 8 terms, the 9 th term 
= an integer
Again, 17 th term = 
= An integer.
Continuing like this, we get an A.P. 1, 9, 17, ...., 1025,
because 1025 th term = the last term in the expansion
(an integer)
If n is the number of terms of above A.P. we have
.
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