Test Index

CBSE Class 10 Basic Math 2025 All Sets Solved Paper

© examsnet.com
Question : 13 of 20
Marks: +1, -0
10th10^{\text{th}} term of the A.P.: -12, -19, -26, is
Solution:  
First term (a) = -12
Common difference (d) = a2−a1a_2 - a_1
= -19 - (-12)
= -19 + 12
= -7
n = 10
an=a+(n−1)da_n = a + (n-1)d
a10=−12+(10−1)×(−7)a_{10} = -12 + (10-1) \times (-7)
= -12 + 9(-7)
= -12 - 63
= -75
© examsnet.com
Go to Question:
Prev Question
Next Question