what is the value of t25 -t9 for the A.p 7,10,13,.... is ?????
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Answer:
t25-t9 = 48
Step-by-step explanation:
a=7
d=t2-t1
d=10-7
d=3
tn=a+(n-1) d
t25=7+(25-1) 3
=7+24×3
=7+72
=79
t9=7+(9-1) 3
=7+8×3
=7+24
= 31
t25-t9 = 79-31
= 48
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