For those who are wondering, 2n - 2n-1 + 1 = 2n-1 + 1 ?
2n - 2n-1 + 1
=> 212n-1 - 2n-1 + 1
=> 2n-1(2 - 1) + 1
=> 2n-1 + 1
@srestha how to find number of terms in gp?
how did you conclude that n=n-1?
terms in GP are from 20 to 2n-2 So total term =n-1.
@ Bad_Doctor Thank you brother!
Another alternative is:
i know but to find the homogenous solution but did not know particular solution
please someone tell me how to put d (or any other variable which we take), in the particular solution
means how to form the equation for prticular solution
@Ayush Upadhyaya @Magma
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