If the nth term of arithmetic progression is, -1,4,9,14……………129. Find the value of n.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Use formula an =a+(n-1)×d129=-1+(n-1)×5130=5n-5 135÷5=n27=n
Its 27
Ram here l is not 149 its 129
N=31
Here a=-1, d=4-(-1)=4+1=5 , l=149so 149=-1+(n-1)x5149=-1+5n-55n=149+6=155so\xa0{tex}\\begin{array}{l}n=\\frac{155}5=31\\\\\\end{array}{/tex}