Question

find "a" if d= -4, n=7 and nth term =16

please friends tell me the answer fast....​

Answer 1

Answer:

• an= a(n-1)d
• 16=a(7-1) -4
• 16=a(24)
• a= 24-16
• a=8

Answer 2

Answer:

$\\ \\ \sf\blue{50} \\ \\ \large\sf\underline\red{given \: that} \\ \\ \sf \: d = - 4 \\\sf n = 7 \\\sf an = 16 \\ \\\large\sf\underline\red{to \: find} \\ \\ \sf{ ☞ \: \: the \: value \: of \: a} \\ \\ \large\sf\underline\red{solution} \\ \\ \sf \: an \: = a + ( n- 1) \\ \\ \sf \: ⇑use \: this \: formula⇑ \\ \\ \sf 16 = a + (7 - 1) - 4 \\ \\ \sf a = 16 + 24 \\ \\ \sf a = 50 \\ \\ \\ \large\sf\underline\red{hence \: varified}$